Bletchleyite
Veteran Member
It may well be that there's no working code for that service.
It would surprise me if there wasn't a code for "all stations to Pwllheli".
Or more likely, they don't switch it on because the 158 system still often struggles with request stops.
It's on at other times of day. I think there's an element of "it's the last train with hardly anyone on it, so why bother"? But I find that approach rather sloppy.